Milling lathe



J, A. DOANE MILLING LATHE 8A Sheets-Sheet l Filed'nec. 59. 1922 INVENTQR JQMISIrOv/ne..

l ATTGRNEY 8 Sheets-.Sheeti 2 INVENTR fanwm.

wf/zw( ATTGRNEY Feb. 22, 1927.

. J. A. DOANE MILLING LATHE 'Filed Dec. 50. 1922 J. A. DOANE Feb. 22, 1927.

MILLING LATHE Filed Dec. 30; 1922 ,--heets-sheet a l k2 INVENTQR ATTORNEY Feb. 22 1927.

J. A. DOANE MILLING LATHE Filed Dec. 30. 1922 Y e sheets-sheet' 4 Ill o jm

INVENTQR @ognuna Feb.- 22,1921. l 1,618,275

. J. A. DOANE MILLING LATHE Filed Dee. 50. 1922 -8 sheets-sheet 5 y 1 l l l l 1 INVENTGR ATTGRNEY Feb. 22, 1927.

J. A. ADQANE MILLING LATHE Filed Dec. 30, 19.22 8 Sheelns-Shei:` 6

NW SQ ATTQRNEY finir. .752.

Feb. zz, 1927.

J. A. DOANE MILLING LATHE Feb. 22 1927.

Filed Dec. 50, 1922 8 Sheets-Sheet' 8 INVENTQ-R ATTORNEY Patented FebQZ-Z, 1927.

UNITED "stares tenais PATENT orrlcl..

JOHN A. DOANE, OF 'HARTEVORD, CONNECTCUT, ASSGNGRKTG ERATT 8c WHITNEY', y

COMPANY, OF NEVJ YORK, N. Y., A CRPORATON GFNEV JERSEY. 'i

Application filed December S0, 1922. Serial No; 609,874.

This invention relates to thread hobbing machines and to special forms of milling machines. More in particular the invention relates to an automatic machine of thisv general type adapted to hob internal or exten nal threads or to mill ycircular forms on either internal or externalv surfaces of an object. i y

An object of the present inventionis to provide a thread hobbing or other form of machine adaptedl to heb or mill rotatable work which will be substantially automatic in its operation and which will enable identical threads or other forms with or without lead to be rapidly and accurately formed on either internal Yor external surfaces of a plurality of similar articles.

Another object of the invention is to pro-- vide a machine of the above characterA hav ing a work spindle mounted in a headstock and adapted to be rotated, and also, when operating to hob threads, to be simultaneously advanced axially a slight distance in accordance with the lead ofthe thread being formed. These movements of the work spindle are preferably automatically controlled in timed relation to axial and transverse movements of the rotatable cutter by means of suitable cams Also, it is an object of the invention to provide a movable cutter carriage of novel form carrying a thread or other type of rotatable cutter. This cutter carriage is manually adjustable along the bed and yalso automatically actuated during operation to advance the cutter .into operative position axially and radially relative to the work.

Another object of the invention is to provide a cutter head for the rotatable cutter which may be held in engagement with the work by gravity or positively depending upon the type of work, and adapted to be disengaged from the work by suitable automatically operating cam means, sov that when the work is completed, the cutter will be automatically withdrawn from the work, thus enabling it to be retracted longitudinally along theI bed.

Another object of the invention is to provide means to adjust the position of thecuter head for operating upon either internal or external work and on worl of different sizes. While working upon external work the cutter is preferably positioned above the work so that it may rest thereon by its weight and that of its adjacent parts. j ln working on internal work the cutter is preferably positioned to engage the upper portions of the surface being operated on and be held positively in engagement therewith.

Another principal object of the present invention is to provide a special control mechanism for the operative movements of the work spindle and the cutter spindle so that they may be automatically operated in accordance with a predetermined cycle. This mechanism, preferably, and inV the form shown, comprises two main camshafts each carrying adrum cam and also having dogs'thereon to control the operations ofn the main clutches to start and stop rotation Y of these shafts.

.Another object of the invention is to provide manual means to start the machine in operation and provide means preventing any interruption toy that cycle of operation Y until it has been completed.

Another object of the invention isA to provide adjustingrmeans for the tool or cutter spindle relative to an oscillating bracket or frame, preferably this comprises -an oseillat-ory member or cutter head which may be suitably positioned relatively to the bracket or frame for operating upon work of .different diameters and adjustable for operation upon either external or internal work. Cam means to oscillate the bracket or frame are provided to engage and disengage the cutter with the work.

TVith these and other objects in view, my invention consists in the features of construction and operation set forth in lthe following specification and illustrated in the tion, the claims appended to this speciiication being relied upon for that purpose..

Fig. 2'is a vertical sectional View of the i en complete niachine taken through the hase.

Fig. 3 is an end vieu' ot the lnachiiw talon longitmlinally on line 53H3 oit Fig. 2 and loohirn;- in the lirection ot .the arrows.

Fig. el is a plan View ot the complete ina chine.

Fig'. li is a horizontal sectional View o'l` the baneJ showing;v the two parallel cam sha'ita liy means of which the operating mechanisme ol the machine are controlled.

Fiig. (l is an elevation ot one ol': the cam sbatte and its cooperating parte.

7 is a similar 'View ol the other cam Fig. 13 is a View similar to ll the cutter in its inoperative positie ternal Work.

Fig. Ll is a View similar to Figi'. l2 with the cutter in its ope'ative position 'tor in ternal Work, y

Fig. 15 is a vien similar to Fig. lil with the cutter in inoperative position for internal Work.

Fig. lll is a diagrammatic rien? in elevation ot the cutter in poeition tor operating on external work, and

Fig'. 1T is a similar rien' ot Fig: lo with the cutter in operative poeition relative to internal Work.

In the alloro mentioned drawings, l hare Shown lont one inoditieatitni ol" the invention forming practically a unirereai thread holiliing and internal and external contour millinginaehine which is non; deemed preferable hut it iS to be understotul that changes and modifications may lie inade Within the scope ot the appendedclaims Withont departing 4troni the Spirit ot' the invention.

Briefly, my invention in itey broadest aa peet coniprlses the following' principal parte: First, a hin-'e on which mounted a headstock carryingY a rotatable Werl: epindie. this headslocl; or carriage being so mounted that it may he given a elia-ht axial movement, preferably by meanl of a cani: second, a cutter carriage alidahly n'iounted on the hase and adapted to carry a thread holihing or other torin ol rotatable niilliru` cutter; third. cani moana to advance this carriage axially along; the hase; fourth, means on the carriage and actuated hy minare ineens oil a `euitahle `earn :to automatically move the cutter into and out ot engagement with the Work in a direction normal to the u'orlt unie: filth, manual adjusting* means to poaition the cutter tor varying diameters and tix/'pes ol u'oik; lninth, a cani shaflt having peripheral cani thereon adapted to control the axial niorementf; ol the work carrying ille: i-aivcnth. another cam shaft pretlily lying' adjacent and parallel to the than cani shalt, adapted to control the moreineuta ol the cutter farriage and its cooperating;- pai and eighth, means to actuate the two cam slia'l'ta in timed relation to each other to canne the operz'itive incremente ot' the coopeintinol parte and `n'iechanisnis to lie acconri'iliehed in accordance 'with a prede ternained timed relation or cycle.

llcterring more particularly tothe figures ot the drawings wherein a preferred term olf the invention is shown. the hase of the machine l() provided with suitable ways ll near one end on which may be slidahly mounted a headetoel; 1L. In this headstoek le? in monnted the Work rotating Spindle 13 which may he provided with a collet lf3 or other torni ot \roi,'lig1'ippi1ig incclnmism. '.l'hie` pre'l'eralily may he operated ley means of a hand lever lzl". Other ways lll: also on the upper horizontal surface ot the liaise l() are provided on which the cutter carriage lo may he nlidalzle longitudinally of the `inaehino. lllithin the hase l() are two maincarn stuitte' :'20 and 2l extending longitudinally 'il t) olf the haae and adapted for controlling` t-he longitudinal positions ot' the headetocl: l2, the cutter carriage l5 and the radial position et the rotatable milling; cutter rela tire to the work axis. (in these main cam eliatte Qtl and 2l are ilirorided clutch op- 105 ezatinomenne in the ttorin ol dogs lnesently to lie deicrilgaed whereby the two cani shafts are started and stopped in accordance with a predetermined cycle of operationa. These clutch operating means and their control lancera and doge are shown clearly in F ti and 7 and in the diagrammatic View lfip. i) eo that their operation will he deacnlied in connection with these figures.

operate ae a thread lioliihingl machine, the ineclianiem and its cycle of operation will he dceerihed particularly with this 'function in rien'. lt will he underetood` however,

[te the machine inimarily designed to that many other operations can he carried .treteralily the rotation ol" the work Spindle CII 13 and the axial movement thereof are-both accomplished from the same shaft, preferablyV the main cam shaft 20. Means also are provided to rotate the spindle 13 slightly more `than one revolution during approximately one complete revolution of this cani shaft 2O and during each cycle Vof operations. Simultaneously during this rotation of the work spindle 13, the headstock 12 is moved longitudinally to forni the lead of the thread if a screw thread is being formed. It will be understood that whenfthe machine is being used for milling operations upon other than threaded work, there will be no axial movement of'thelieadstocl; 12.

rl`he main drive for the machine whereby all the operative movements of the parts are accomplished preferably comprises 'a motor which may be mounted on or adjacent the base 1G. This motor 30 is in driving relation'with 'a main power shaft 31 in rearl of the machine through a belt 'or other driving connection On the naiin driving shaft 31 is a main driving worin 33 in mesh with a worm wheel 34 mounted on a sha-ftl 35 eX- tending forward and downward relative j to the base 10 of the machine. Itis from this worin and worin wheel 34 that the rotative and axial movements of the work spindle 13 are obtained. From this worm 33 and worm wheel 34 also the axial and radial positionsy of the cutter spindle Q6 are varied during operation of the nachine. Gn the forward end of the shaft to whichthe worin wheel 34 is fastei'ied is a bevel gear 36. This bevel gear 36 in mesh with a corresponding bevel gear 37mounted upon a short sleeveA e@ The snort sleeve 33 comprises the intermediate member of a pair of clutches designated by A and B. Preferably, as shown, the ends of this sleeve 38 are formed with serrated teeth adapted to positively engage corresponding teeth on the complementary clutch members forming respectively the clutches A and B, so that, when in operative position, the clutches A and B positively drive their respective shafts.

Referring to the diagrammatic View (Fig. 9) this construction will be clear. Preferably, the sleeve 33 rotatably mounted over the contiguous ends of two shafts in alignment within the base 10. @ne of these shafts is the cani shaft 21 and the other a shaft 39 from which the other main 'cam shaft 2O is rotated. rl`lie clutch A, one ineinber of which spliiied to shaft- 21 and the other formed by the sleeve 33, serves to rotate the cam shaft when in its closed or operative position. l'n vva similar manner clutch l5 serves to rot-ate its sliaitlj) when in its operative pos ion and through driving connection which presently will be described rotates the camshaft 20.

It will be seen from the above, as the sleeve 33 is directly connected to the lmotor rilso on themain drive vshaft 31 are the means for rotating the cutter 22 by means of its spindle 26. Preferably, near one end of this main driving shaft 31v is another' pair of clutch members, the central member 40 .of which is splined to an extension 43 to the main shaft 31 and lying in alignment therewith. rlhis member 40 may be moved into mesh with a gear 41 rotatable with a sleeve splined to the main shaft 31 (see Fig. 10) or with another gear 42 rotatably mounted on the extension shaft 43. Each of these gears 41 and 42 is in mesh respectively with corresponding gea-m44 and 45 mounted adjacent thereto and each fastened to a short drive shaft 4G. Cooperating clutch memers adapted to engage with the member l40 are mounted on the hubs of the gears 41 and 42. By moving the central clutch member 40 in either direction, the main driving shaft 31 is placed in driving relation to the extension shaft 43y in alignment therewith either' directlyv or through the gears 44 and on the short shaft 46. This permits the aft 43 to be rotated at either of two vdifferent speeds and in the same direction.

Nith the clutch member 40 in one position, the extension 43 to the main drive shaft 31 is driven the speed of the main drive shaft while with the clutch in the opposite position, it is driven at a greatly reduced speed through the reduction gearing comprising the gears 41, 42, 44, 45. The cutter driving connections are all driven from this extension shaft 43 and are preferably mounted, as shown, in rear of the cutter carriage to which they are attached so as to move therewith. The drive shaft 31 also 11s splined to its driving means associated with the motor 30 so that it is moved axially with movements along the bed of the cutter carriage 15. Y

On the extension shaft 43 and also mounted on the critter carriage 15 is a reversing mechanism comprising a pair of bevel gears and 49 loosely mounted soas to be ro-` tatable on shaft 43, either one of which may be positively connected thereto by engagement lof a central clutch member 50 which is splin-ed to the shaft. A shaft 51 having a bevel gear 52 fastened thereto and'in mesh with bevel gears 48 and 49 may therefore be driven in either direction dependent upon the position of the Vclutch 50. Shaft 51 extende forwardly on the carriage l5 and is provided with a bevel gear o?) taetened on its :t'orward end which is in ineeh with a corresponding! bevel gear .3i-l mounted on a ehort shalt no which drives', another shaltI 56 extending` `parallel tliereto by lucana4 oi a pair of spur ears 5T and 5S. This shatt- 56. through au idler gear of), ie in drivingrgI connection with a cutter spindle 2li through Spur gears (lo and ol. The cutter Spindle driven b v the fears (5() and (l niaji' be provided at one end with the thread cutting;- hob or other 4t'orin of rotatable million' cutter particularly adapted :tor the wort; beinglr operated on.

In order to var v the Speed ot the cutter spindle 2li in addition to the two dillerent speeds` obtained Atroni the clutch el() and gearing` con'lprissing: the gears iil, 4:2. #l-'l and 115, the gears 5T and Sti are placed on the endsof their respective sha'l'ta and no so that they nia'v readliv he removed and other gears of dillerent. sizes substituted. ou one oit the intermediate Shafts, ae lior instance. shalt fit1. a entail il),Y wheel (313 may he placed to aid the cartina` action and smoothness ot operation of the cutter 22.

Ae it necessary to move the cutter carriage l5 and its cutter to advance it` axially toward the wol-li, particularly when the machine is operating;l upon internal Screw threaded work, l provide a cani drinn T0 inounted upon the cani :Shaft El] and connected to the cutter carriage l5 b v lucana ot the adjustable connectingl linl; or rod The rotation of this cani shaft 21 as well as cani shaft 20 is controlled automaticalliv hv doge thereon adapted to control the poeitions1 ofthe clutches A and B. liv nie-anal ol. these dogs and clutches the rotation ot the Shafts 20 ad 2l is started and stopped during the cvcle oi? operations eo that while the work Spindle lrl is not rotating the eutter spindle QG may,r be advanced axialliv toward its operative poeition. Also while `the work is rotating, the cutter carriage lo nia); be. held troni axial niovelnent by reason ot the t'orin ot the cani groove T1 with which the ani drinn 'T0 is provided. The niechanism for controlling the 'operation ol' the cutter carriage l5 and parts mounted tl1ereon will tiret be described.

Preferably, the adjustable connection bctween the cani drinn and the cutter cal-- ringe 15 comprises the elongated bar "i0 which. has a roller 73 dveiiiending 'troni one end. This roller 78 is adapted to engage the "ani oroovel in cani T0 so that rcciprmatorv nuiveinenta are imparted to thiay rod 72 by rotation ot the cani 70. The bar or rod 72 is also provided with an elongated slot adapted to retain bolla Tlov ineans ol" which the iarriage nlav be ad juetablv secured to the har. liv securing` the cutter carriage l5 to the bar T2 at dila nomma ferent portions thereof, the position ot the carriage l5 mayv be varied tor dilierent lengths ol work. In any position ot adjustnlenty the advancingl .nioveinent ot the carriagre l5 into and out` ot' its longitudinal operative position is that obtained 'troni the cani groove 7l. 'lhie movement i5 required to advance the cutter 22 accurately to a predeternlined adjustable position relative to the work and to retract the cutter 22 Sullicient dietance to permit the operator to reinove n'orl; and reload work on the work spindle 13.

ln addition to the axial or longitudinal nlovenient oi the cutter carriage l5 to advance or retracttlle cutter and ite nlount inge toward or lironl operative position, it, is necceeariv to .move the cutter 22 in a direction normal to its axis into and out oit' cuttinik;- depth .in the work. This normal or radial movement ol the cutter 22 must be auliieient to nieve the cutter into full outting' depth .in the worlt as soon as the ineehanient ia .in position tor operation and, on` ite return movement, moet serve to completely dieting-age the cutter 22 4l'roin the work. I therefore provide a small cani` remov abljv nionnted upon the end ol? a Shaft TG extending in a direction parallel to the cutter spindle 2G. This einall cani 75, in one poeition, is adapted to hold the cutter 22 and cutter Spindle 2G in its inoperative poeltion and, as soon as the cutter is moved axially into operative position, the cani 75 is rotated to varjyv the radial position ol the cutter relative to the axis olf the work. The cani T5 contacte with a bearingl plate 77 provided on the lower surface oil' the oSoiL latory ineinber on which the Spindle QG is mounted.

'l`o aetuate this cani T5 to oscillate the cutter Spindle 26 periodically during the cycle of operatioin a l'ace cani 8() on the cani drinn 7l) ie provided, the, forni of its groove being euch that at one point it forces the cam T5 to rotate through a small angle and7 at another point, to retin-n to ite initial posi.- tion. This; cani Slo ne well aa cani 'To is prefeirablvY niade in auch a manner that it .may be inade use ot when the niachine is being used either tor external or internal thread inge' or other operations.

At the present preferred torni of the ulachiiue ie deeigned :ior both external and internal screw thrauled or other work, it is iieceeiiii'lyY to :nove the cutter spindle 2li in oppoeite direetione1 to nieve it rcspt-xctively into and out ot euttine; depth dependent, on whether the work beine` operated on is external or internal. `li`or external work. the operative position oi can! To and the cutter hpindle i343 are shown clearlyv in lllize. 123, the correeptnidinn inopcralive 'position oit the rain T53 tl'or external work being shown in Fig. 13, Freni tliifs it will be seen that Cil 1,eis,275

while the 4cutter 22 is positively held out of engagementfrom the work in its inoperative position, as soon as cutting is to be started, the cam 75 is rotated slightly thus permit` ting the cutter spindle 22 with its connected parts to drop slightly. During operation upon external surfaces, therefore, the cutter is held down to its Working depth by the Weight of parts associated with this spindle 22. Y

While operating upon internal Work, the cutter 22 is elevated into and held positively intocutting depth in the work. During the inoperative period it is permitted to drop slightly out of engagement from the Work. The operative position of the work spindle 22 While Yoperating on internal Work is shown inr Fig. 1li and the corresponding inoperative position for internal Worlr is shown in Fig. 15. y Y

rllhe connections for operating this depth cam 75 from the groove 81 on the facecam 80 `fastened to one face. of dr in 70 are shown clearly in the drawings in Figs. 9 and 11.

A lever'82, one end of which is providedV with a roller 83, engages the cam groove 81 and is mounted on an oscillating shaft 8e. This shaft 84 is splined substantially throughout its length and is engaged by a short lever`85 retained so as to move axially with the cutter vcarriage 15. On this lever 85 is pivotally attached a reach arm 86,'the opposite Vend of Which is attached to a lever 87 on the same shaft 76 rwith the depth cam 75.

Oscillation therefore of the shaft-.8d induced from the cam groove 81 and the connections above described periodically oscillates the depth cam 75 intoand out of operative position. the form and angular position of the v.cam groove 81 is such that the Vmovements of this depth cam 75 occur at the proper points in the cycle of operations. These movements of the cutter 22 into and out of operative position occur at exactly the same f points in the cycle of operation when the machine is operating either on internal or external threads, so that the above described mechanism may be used for either external or internal Work.' The cam 75 must hoW- over be disposed to move the critter spindle 20 in one direction for internal Work and iny exactly the opposite direction at the same rpoint in the cycle for external work. For

this purpose the depth cam l5 is provided with a keyvvayadapted to engage a key inserted in shaft' angularly 'spaced slightly from its projectionlower the spindle 2G. By placingtlie cam 1t will bev understoodthat In one position of the cam 75 on its shaft 76 therefore, the cutter 7 5 onits shaft 76 with one face outward for external work and the otherY face outward for internal work, itis adapted for controlling the cutter spindle 26vto moveit toward and from the Work axis at the proper points in the cycle of operation for either internal or external operations. l

rthe axial movements of the head stock 12 and the rotation of the Work spindle 13 which takes place in timed relation to the above described movements of the cutter spindle 26 will now be described.

Preferably, the rotation. of the Work' spindle 13 and its axial movement by reason of the movement of the headstock 12 during operation are bothobtaned from positive driving connections extending from the main driving .sleeve 38 above referred to. These driving connections for rotating this spindle 13 comprise the shaft 39 coaxially mounted with said sleeve 38 and Which is adapted to drive another shaft 90 at either of tvvo dierent speeds in the same direction,

`this being accomplished through Vtvvo sets One of these sets ofV gearing the shaft 90. 1n `driving relation With this y shaft 90 is .another shaft 100 vextending Vparallel thereto Which is driven therefrom by a pair of spur gears 101 and 102. The shaft 100 also has a pinion103 thereon ininterinesliing relation Withva gear 104 on cam shaft 20. `llt is by means of the rotation of thiscam shaft 20 that the rotation of Work spindle 13 and axial movement of the headstock 12 are accomplished.

On cam shaft 20 is a drum ca1n1106 for axially advancing the Work spindle 13 byL v110, gear being fastenedrdirectly to the ivorl: spindle 13. The` ratio ofthese latter vgears 108 and 110 is such that they rotate the Work spindle 13 slightly more than one revolution forrone revolution of the rshaft r2,0. 1t will be seen, therefore, that When the main power shaft 31 is rotating and With Ythe clutch B in proper driving position, the

work spindle 13 may be rotated at'either of two `different speeds and, simultaneously With this rotation of the work spindle 13,t together ,with the headstock 12 will be moved axially by Vmeans of the peripheral groove 107- on the drum cam 106.

The camV drum 106 for controlling the provide a rack 145 fixed tothe lower surface ofthe cutter carriage 15. This is in mesh with a smally pinion 146 on a forWardly'eX- tending shaft 147. The forward end of the shaft 147 is squared as at 148 so that by means of a suitable Wrench the pinion 146 may be rotated to position the tool carriage i at any point along the Ways 14 that may be desired. Then the cuttercarriage 15 has been positioned accurately into any predetermined axialposition preparatory to operation, the cutter carriage 15 is clamped to the adjustable connectingrod 7 2 through which its movements are controlled from thev cam' groove 71 on cam drum 70.

Y The individual mechanismshave each been described7 and now a short description of the cycle of operations will be given together With a description of the means vwhereby this cycle is accomplished. It Will be understood that the specific cycle described is that for forming internal screw threads during which operation all of the above described mechanisms are made use of. In using the machine for forming external screW threads yor other operations, some of the above described mechanisms are not essential or required and may therefore Vbe made inoperative. l,

The complete cycle of operations for forming internal screw threads comprises; first, movement of the cutter carriage 15 into its longitudinal operative position; second, radial or normal movement of the cutter spindle 26 by oscillation of the bracket 12()V so that the cutter 22 moves into depth in thek work; third, rotation of the Work spindlev 13 through slightly more than a complete revolution While the cutter carriage 15 and spindle 26 are retained in their operative position; fourth, relative axial movement ofthe cutter 22 and Work spindle 13 simultaneously With the rotatlonof the Work spindle 3, this being accomplished by movement of the headstock 12 along the base 10; fifth,`

disengagement of the cutter 22 from depth by oscillation of the bracket 120 inthe reverse direct-ion; and siXtln-return of the cutter carriage 15V longitudinally of the base 4to its original position. A`Pneferably th'emachine is automatically stopped at the end of this Aoperative cycle to permit the operator to remove completed Work andreload the Work spindle 13 with another blank. To actuate the machine in accordance with this predetermined cycle, a plurality of clutches and clutch operating mechanisms are made use of. These clutches are preferably operated bymeans of dogs mounted on the tivo cam shafts and 2,1, the positions of the dogs being angularly arranged on their respective shafts so that the clutches are controlled in proper sequence and in accordance with a predetermined cycle. These parts are all shown diagrammatically in Fig. 9 and they will be described with particular reference to this diagrammatic view. y

Upon movement movement of starting l-ever 150 to its vertical or operative position,

thepclutch indicated at A engages the mainY driving sleeve 38 so'that the cutter cam shaft 21 is started to rotate. This is acc inplished directly by this starting lever lO vwhich is mounted on an oscillating shaft 51 having a clutch operating yoke member 5 2 thereon. This shaft 151 through levers 3 and a connecting rod 154 is connected to a second oscillating shaft 155 having a lever 156thereon adjacent a disk cam 157 on the ivork spindle cam shaft. 20. The purpose of this latter Vcam 157 and parts engaging it will presently be described. This rotation ofthe cutter cam shaft 21 advances* the cutter carriage 15 `longitudinally of the base 'by means'of the cam drum 70 and its cam groove '71 to advance the cutter 22axially' into its Work engaging position. Also, rotation of this shaft 21 rotates the fac-e camv 100 8O to oscillate cam 7 5 and oscillate the cutter 22 on the cutter head 125 into Working depth by a slight movement normal to its axial movement.-

The rotative movement of the cutter cam shaft 21 continues for a. fraction of a revolution only. VJust before it is stopped a clutch operating dog 160 thereon moves the clutch I5 into driving'relationship with the 'opposite end of the driving sleeve 38. Thisr 110 is Vaccomplished bymeans of an oscillatory shaft 161 having a lever 162 thereon engaging the dog 160. -This oscillates the shaft 161 which, through levers 163 and connecting rod 164 oscillates sha-ft 165 on Whichis mount- 11'5 ed the yoke 166 by means of which the clutch B is moved to its operative position. This occurs at a predetermined time during` the rotation of cam shaft-21 by reason of the position of this latter clutch engaging dog 160. This starts theV rotation'of the VWork spindle cam shaft 2O which extends parallel with Vther cam shaft 21. Rotationv of this Worl'cspindle cam-shaft 20 rotates the Vlead l cam 10G thereon to axially advance the ivork spindle 13 along the base 10. It also Yservesl to" positively rotate theyvork` spindle .13 through driving connections described above. The specific mechanisms associated with the cam shaft- 20 for advancing and rotating the 130 tion, a base, a headstock thereonhaving a" rotatable work carrying spindle therein,

meanstoA axially advance the headstock along the base, a cutter carriagelongitudinally movable alongthe base in a direction parallel to the movementof the headstock to position a cutter relative .to thewvork, a cutter head thereon, a cutter spindle in said cutter head, means to rotate said cutter spindle, automatic means to vary the position ofthe cutter spindle toward vor from the axis of rotation ot' the Work spindle,

Vand means to vcontrol the movements oit the nally' movable along the base in a direction parallel to the movement of the headstock to position a cutter relative to the Work, a cutter 'head thereon. a cutter spindle in said cutter head, means to rotate said cutter spindle, automatic means to var v the position of the cuttercspindle toward or from the axis et rotation of the Work spindle, and means to control the movements ot Athe headstock and cutter head in accordance with a predetermined cycle and in timed relation With the rotation ot the Work spindle. v 3. A milling lathe comprising in combination, a base, a headstock thereon having a rotatable Work carrying spindle therein, means to axiallyV advance the 'headstoclc along the base, a cutter carriage longitudinally movable along `the base in a direction parallel to the movement of the headstock toposition a cutter relative to the Work, al

l 'cutter head thereon, a cutter spindle therein,

means Vto rotate said cutter spindle, autoi matic means to vary the position of the cut-r ter spindle toward or from the axis of rotation ot the Work spindle, and automatic cam operated means to control the movements of -the headstock and cutter head in accordance with a predetermined cycle.

4. A milling lathe comprising in combination, a base, a headstock thereon having Va rotatable Work carrying spindle therein,

i' means to positively rotate the Work spindle,

means to axially advance the headstock alongv the base, Va cutterV carriage .longitudinally movablealong the base in a direction parallelto the movement of the headstoclr ,L to position a cutter relative to the Work,`a cutter head thereon, a cutter Vspindle therein,

means 'to rotate said cutter spindle, automatic' means to vary the positionY of the cutter spindle toward` or from the axis of rotation ot' the Work spindle, and automatic in accordance With' a predetermined cycle and in timed relation `With the rotation'of the work spindle.v l Y 5. A'milling lathe comprising in combination, a base, a headstock thereon having a rotatable Work carrying spindle therein, means to axially advance thev headstock along thebase, a cutter carriagelongitudi-v nally movable along the base in a direction parallel to the'movement'ot the headstock to position a cutter relative to the Work, a cutter head thereon, a cutter spindle therein, means to rotate said cutter spindle, automatic means to vary the position of the cutter spindle toward or from the axis of rotation ot the work spindle, automatic means to vary the position of the cutter carriage along the base, vand means to control the movements et the headstock, cutter carriage, and cutter head-in accordance with a predetermined cycle.

6. -A milling lathe comprising in combination, a base, a headstock thereon having a rotatable Work carrying spindle therein, means to positively rotate the Work spindle, means to axially advance the headstock alongthe base, a cutter carriage longitudinally movable along the base in a direction parallel to the movement of the headstock to posit-ion a cutter relativeto the Work, a cutter head thereon, a cutter spindle therein, means to rotate said cut-ter spindle, automatic meanst-o vary the position of the cutter spindle toward orA from theV axis otrotation of the Work spindle, automatic meansto vary the position of the cutter carriage along the base, and means to control the movements of the headstock, cutter carriage, and cutter head in accordance With a predetermined cycleV and intimed relation withr the rotation of the Work spindle.A

7. A milling llathe comprising in combination, a base, a headstock slidable thereon havingY aV rotatableV Work carrying spindle therein, a cutter carriage movable'along thel base, an oscillatory cutter head on said car-V ri age, a rotatable cutter spindle in said head,

automatic means to advance the, cutter carriage toward the headstock, automatic means to oscillate the cutter head to move the cutter into and out of depth in the Work, said?- 18. In a milling lathe, in combination, a base, a cutter carriage adwted tobeV slidably mounted on said base, a pivotalljT mounted bracket or frame thereon adapted to oscillate about an axis parallel with said base, cam means to oscillate said frame, a cutter head on said frame having a rotatable cutter spindle therein, the axis of Which is parallel to the direction of movement of the carriage, means to adjust the radial position ol said head relative to said frame, means to rotate the cutter spindle,and means to control the oscillatory movements of'said bracket in timed relation to the sliding movement of said carriage.

19. In a milling lathe, in combination, a base, a cutter carriage adapted to be slidably mounted on said base, a pivotally mounted bracketor frame thereon, cam means to o'scillate said fra.1ne,-a cutter head on said frame having a rotatablev cutter spindle therein, Worm and Worm Wheel means to adjust the position ofsaid head relative to said frame, and means to rotate the cutter. spindle.

20. In a milling lathe, in combination, a base, a cutter carriage adapted to be slidably mounted on said base, a pivotally kmounted bracket or frame thereon, cam

means to oscillate said frame, a cutter head on said frame having a rotatable cutter spindle therein, means to adjust the position of said head relative to said frame, means to adjust the angular position of said bracket and head relative to the carriage, and means to rotate the cutter spindle.

2l. In a milling lathe, in combination, a base, a cutter carriage adapted to be slidably mounted on said base, va pivotally mounted bracket or frame thereon adapted to oscillate about an axis parallel With said base, cam means to oscillate said frame, a

cutter head on said frame having a rotatable cutter spindle therein, meansto oscillate said head relative to said frame about the same mounted on said base, an angularly adjust- 5 able plate member on said carriage, a pivotally mounted bracket or frame on said plate member, cam means to oscillate said frame, a cutter head on said frame having a rotatable cutter spindle therein, means to oscillate said head relative to said frame, and means to rotate the cutter spindle.

23. In a milling lathe, in combination, a base, a cutter carriage adapted to be slidably mounted on said base, an angularly adjustable plate member on said carriage adapted to be adjusted about an axis extending transversely of the base, a pivotally mounted bracket or frame on said. plate member, means to oscillate said frame on said carriage, a cutter head on said frame having a rotatableV cutter spindle therein, means to oscillate said head relative to said frame, and means to rotate the cutter spindle.

24. In a milling lathe, in combination, a 7 base, a cutter carriage adapted to be slidably mounted on said base, an angularly adjustable plate member on said carriage adapted to be adjusted about an axis extending transversely of the base, a pivotally mounted bracket or frame on said plate member, a cutter head on said frame having a rotatable cutter spindle therein, means to oscillate said frame and head about any axis parallel With said base, and means to rotate the cutter spindle. j

In testimony whereof, I hereto aiiix my signature.

JOHN A. DOANE. 

